Coming soon to the App Store

Tune by feel.

FasTune is a fast, glanceable tuner for guitar and bass on iPhone and Apple Watch. A big pedal-style display shows the note, and your watch taps your wrist the moment the string is in tune.

Tell me when it launches Help & FAQ

EADGBE

♯

in tune

82.4 Hz

♯

in tune

Why FasTune

Inspired by the pedal on your board.

Classic stage tuners are great because they're simple: big note, clear meter, an obvious in-tune signal. FasTune brings that clarity to the devices you already carry.

Fast and readable

Opens straight into listening. A large fourteen-segment note and a 21-segment meter you can read from across the room.

Haptics on your wrist

Your fretting wrist sits right by the headstock. Feel a tap on Apple Watch when you're in tune and keep your eyes on the strings.

Private by design

FasTune listens only while it's open. Audio is processed on your device and never recorded or sent anywhere.

Features

Everything you need. Nothing in the way.

Built for players who just want to tune and play.

Chromatic mode shows the nearest note for anything you play.
Instrument mode locks onto the nearest string of your tuning and shows which string you're on.
Guitar and bass: 6, 7 and 8-string guitar and 4 and 5-string bass, with 22 built-in tunings.
Custom tunings: create your own, or copy a built-in tuning and change it.
Goes low: detects down to the low B of a 5-string bass (31 Hz).
Adjustable: reference pitch from A4 = 430 to 450 Hz, and an in-tune range from ±1 to ±5 cents.
Haptic tap and optional sound when you're in tune, set separately on each device.
Syncs your settings and custom tunings between iPhone and Apple Watch.

Reading the meter

Red, orange, green. Then a tap.

FarMore than 10 cents off

Close3 to 10 cents off

In tuneWithin your in-tune range, ±2 cents by default

In tune is never shown by color alone: the center segment of the meter grows taller, and you feel a haptic tap.